I want to use some of the images in the VS2005ImageLibrary as icons for buttons (IE: I need an UP arrow). This has a variety of images and types. The .png images work just fine.

However the ones I need have the pink background which is supposed to be a transparency key. I can only achieve two effects.

1. A black arrow with a pink background on my button.

2. A black arrow on my button that has transparency, but it is transparency to my desktop. IE: You can move the form around and see through it to other applications or desktop images.

I just want the uparrow (and a few other ones) where the pink is transparent to the control it is on and no further. Does anyone know how to do this?